It's a 91LS with b20 motor and I have no clue where that connector goes. I put all the original parts from the old motor on to the new one. That connector is the only thing that is not pluged up on the harness. The old motor had same prob. it was from 95LS. The wire has swang in the wind since before i owned it. Could it be the coolant fan switch? I replaced the two switch's on the head to try and fix my fan prob. And NAPA auto sold me a third that would fit the dangling connector, but theirs no spot on the block for it to plug into.